Group key agreement (GKA) allows a set of players to establish a shared secret and thus bootstrap secure group communication. GKA is very useful in many types of peer group scenarios and applications. Since all GKA protocols involve multiple rounds, robustness to player failures is important and desirable. A robust group key agreement (RGKA) protocol runs to completion even if some players fail...

We study the performance of Selective Acknowledgements with TCP over the UBR service category We examine various UBR drop policies TCP mechanisms and network configurations to recommend optimal parameters for TCP over UBR We discuss various TCP congestion control mechanisms compare their performance for LAN and WAN networks We describe the effect of satellite delays on TCP performance over UBR ...

The advanced multimedia and high-speed networks make distributed interactive systems more promising and practical. These systems are distributed systems, which allow many clients who are located in different locations to concurrently explore and interact with each other. This system can be built in both the local area network (LAN), and the wide area network (WAN), such as the Internet. Operati...

The advanced multimedia and high-speed networks make distributed interactive systems more promising and practical. These systems are distributed systems, which allow many clients located in different locations to concurrently explore and interact with each other. The systems can be built either in the local area network (LAN), or the wide area network (WAN), such as the Internet. Operations iss...

The Columbia VoD testbed is used to study the impact of a long distance and multi-switch connection and extreme conditions of impairments (delay variation, loss and error) on the objective and subjective Quality of Service (QoS) for VoD. This paper extends our preliminary results of the Columbia VoD testbed in an ATM-LAN. We compare the QoS performance (i.e. jitter, losses, and subjective param...

Understanding the end-to-end packet delay dynamics of the Internet is of crucial importance since it directly affects the QoS (Quality of Services) of various applications, and it enables us to design an efficient congestion control mechanism. In our previous studies, we have measured round-trip time of the Internet, and have modeled its dynamics by the ARX (Auto-Regressive eXogenous) model usi...

The Columbia VoD testbed is used to study the impact of a long distance and multi-switch connection and extreme conditions of impairments (delay variation, loss and error) on the objective and subjective Quality of Service (QoS) for VoD. This paper extends our preliminary results of the Columbia VoD testbed in an ATM-LAN. We compare the QoS performance (i.e. jitter, losses, and subjective param...

Most of the distributed applications are presently based on architectural models that don’t involve real-time knowledge of network status and of their network usage. Moreover the new ”network aware” architectures are still under development and their design is not yet fully defined. We considered, as use case, an application using ODBMS (Objectivity/DB) for distributed analysis of experimental ...

Today it is evident that ATM technology will have its role in the future of Internetworking. Two major Internet backbone service providers, Sprint and MCI, have marketed their investments in ATM as a way to push more bandwidth into their Internet in-frastructures. Regardless of whether ATM technology will thrive in the WAN or LAN, it is also evident that the Internet Protocol (IP), which has be...

The characterization of ATM traac is very important in many aspects such as validating traac models, designing congestion control algorithms, implementing communication protocols, and developing switch architectures. In this paper, we present measurements of applications obtained from the High-Speed Networking and Performance Lab (HSNP) at Michigan State University. These applications are selec...